21. I was really anxious about you. You home without a word
A. mustn’t leave B. shouldn't have left
C. couldn't have left D. needn' t leave
22. If you your name and address on the card, we’ll send the book to you as soon as it is retumed.
A. go over B. fill in
C. find out D.carry out
23. Would you like more coffee? I’m sure you would .
A. much B. few C. any D.a lot
24. These are common materials we are all familiar.
A. about which B. of which
C. with which D. to which
25. of danger, he jumped into the river all at once.
A. Because B. In terms C. Instead D. carry out
26. When I leave the research institute next week, I there for 18 years.
A. shall be working B. will work
C. shall have worked D. have worked
27. The number of children from l to 15 in different families.
A. varies B. seems C. changes D. turns
28. In ancient time’s people used to build their houses with materials .
A. convenient B. important C. available D. natural
29. She agreed without the slightest .
A. hesitation B. thinking C. look D. hope
30. Is there any they'll ever find a cure for the common cold?
A. prospective B. prospect C. prosperity D. prosperous
31. Some people are color-blinded and cannot between blue and green.
A. distinguish B. differ C. separate D. divide
32. knows the name of this song will receive a prize from the radio station.
A.One B.Who C. Anyone D. Whoever
33. All the countries are customers or customers of the United States.
A. potential B.pretended C.preventive D.pretective
34. The safety rules are__ anyone.
A. applied on B. applied in C. applied for D. applied to
35. We got to the station only _ that the train had just left.
A. learned B. to learn C. learning D. having learned
